Keyhole-guard.



P. B. JAEGER.

KBYHOLE GUARD. n AIPPLIOATIONYIILLD JULY 25,v 1913.

Patented May 2, 1914u Ell-Enea.

97 w SIW/w01;

eigen etienne i? FRANK B, JiEG'E, F MIL'WUKEE, "WISCNSFIN,

KEYHOLEGAED.

Loeneeo Specification of Letters Extent.

Patented Moy 2S.;

Application flied. July .25, 19ml Serial No. *191,236.

To all fww/m, it may concern:

Be it known that if, FRANK B. Jimeno, a

citizen of the United States, iesicling at MiL f ,Waukee in 'the county of Milwaukee and o State I Wisconsin, have invented certain new and useful Improvements in Keyhole- Gunrds, of which the following is e specimotion. v. l

My invention relates to locks and petit-ienlarly to padlocks.

The prima@ object oi my invention is the provision of a protective mechanism for pacllools oi* other locks so constructed ais to prevent the insertion of a key into the peut look except by one who know; the seeret of the look.

A fur-ther object of the invention is the provision of zt lock, the keyhole whereof is closed by o door, the doeil being held dosed by e letching device so constructed that it may loe teleaeod from its engagement with l the door by the insertion of a suitable `mstiunleint7 the parts, however, being' so formati es to loe included in the general ornea montati n of the lock ammi tous ilentiiied only by one who understands the secret ot the lock.

A uitliei object oi the invention is to so construct the look; as to provide two focosj these feces having precisely the same eheraoter and appearance, one of the eases, howeve??7 ,having :i sliilitable element disposed the'ein, engaging with e loten. enel having et door with which the latch engages, the 'door concealing the key opening of 'the lock.

Other objects will appear in the course of the following' description.

My invention .is illustrated in the escom panying tlioeings, wlieie'izm Figure l is a face View oi' a. paddock oonstructeol in mooi-dance with my invention, the doot' boing olosetl.- Fig. .2 is a. like View to Fig. l but showing the doot' conm-,filing the keyhole heli open. 3 is e seetion on the line 4 4; of Fig., i. Fig. s e ieg inentmy section on the line mi of lig. i. Fig. 5 1s e :fragmentary enleige seotion on the line, 6-tl of Fig. 2.

Coi'respondingnnd lilmgtreets one i'o'ietie to .in the following deeeription enti inciieeted in eli the views of" tlienceomponying dtowings by the seme efetonoe `eliiii-'tentens.

,Referring to those drawings it loo :Je :i

that the ,onolook as illustrated ties on .or

nary oime fl compzsises e. liory i?. having opposti-ely. :imposed yfeoogil-tutti; aand 4i The body of the look isprovicloel with the eene 6 between which is pivotefl o. iiesp I anni oppo site the eens C the loci: bocly'is provialeci with entsl 8 which are identical in stunt-e and arrangement with ears 6. The ond. of the hasp paes through :in opening in lthe plate ll of the body, and is adapted to be ongegefl by any suitable bolt, es usual in looks oi this Qberficter.

The mechanism whereby the bolt 19 is operated through the mefiimn of e, key be of any suitable eliefeeter and it from e no port of my piesent invention. not shown. The fece plete t of one sitio ,f body of the lool; is slotte@L as et 18 iti t passage of e key whereby the bolt n' operated A. guard-plete i5 is fiispos tween the faceplates 3 enti ono. is for. with a key-hole slot 16. The bit of the 35,

l-ey is, of ooni'se, also if :smoel so es to be :teooininodntetl to the slot l@ and the slot 16.

The foce plete 4, es oeioie ated, Ais orineoi with tile siot i8 which lios, oil Anse, the form ot the key, this elet being so formed that it will only *Limit the insetion of :t Jziitioular forni ofi key. "Lillie slot is son rounded by on ornamental fra-me designated 28, this ironie in the particulate instance shown having the form oi" a. door iframe, the door frame' comprising oppositely liepoeed parallel piers 29 end the peflinient 30 which is triangular in form. Dispose-fi within the pedimont ie :i design unit Si illustinted as having the form of a figure eight although it may lieve :my otliei' suitable forni This element 31, as illustrated in Fig. 5 is pivotecl at one end by ineens of a. pin, stud o1' tivet 32 to the foce plete 4, whilethe otlieiend oi? the element 3i is free to move' vertically. This free end of the element 3l is provided with the inwai'ly projecting pin 33 passing through e slot 3 in the face plate,` and this pin :it its inner; end is eonnted toa latch illustrated in V100 slotted lines in Fig?. 2. The latch is angulei' in oi'in amelA one end of the latch is K formed with nml eonneoted to a spi'ing 35 which nets to foto?. t-lfleietch downward. The lon'eiI angulo? extremity of the latch 105 Ais yieldingly held by the spring 35 projeot- 37l extending into the. lintel and sill ofthe door frame. The door is provided on its inner side face with the outwardly projecting keeper 38 with which-the detent end of the latching member engages, as illustrated in Fig. 3, so as to hold the door closed.

The door is urged to an open position by means ora a spring 39 attached to the inside face of the plate 4 and'having a pin Ll0 which projects through an opening in the plate 4 in that corner of the space surrounded by the door frame opposite to the opening 36. Thus when the latch 35 is raised and released rom its engagement with the keeper 34 the door will be urged open by the spring 39, as shown in Fig. 2, thus disclosing the slot 18.

The plate 3 which forms the opposite side oi' the padlock has exactly the same design as the plate 4. ln other words, it is provided with an imitation door frame E28a or precisely the same form as the door frame 28 and this frame includes a pediment 301 of the same form as the pediment 30 on the opposite face of the adlock, and within the space bounded by this pediment there is disposed a design unit or element 31a having the same form as the element'l. This element 31a, however, is not movable but is formed as part of the' ace plate 3. rlhere is no slot in the space bounded by the face plate 3 however. When the door 37 is closed, therefore, the two faces of the adlock look precisely alike. -Both of them ave a door frame surrounding a plain unbroken space; both of them have a pediment above the door frame; and both of them have an ornamental design unit or element disposed within the pediment. There is'no apparent keyhole, nor is there any indication on the face of the lock leading one to uess on which side the key is to be inserte nor is there any indication leading one to believe that there is a door in the plate 4 which when opened would disclose the keyhole. The spring 35 has suicient strength to hold the element 31 against ordinary pressure so that considerable experiment may be made with the lock before it is discovered that one of the elements 31 is movable. As a matter of fact, it is almost impossible todiscover .the secret of this lock lby one who does not understand its construction.

In the operation of the invention, when it is desired to open the padlock, it is necessary to insert a knife blade or a blade of like character belet? the free end of the element 31 and force it upward against the action'of the spring 35a. This will withdraw the latch 35 whereby to cause the door to open. As .soon as the door opens; the key may be inserted kin the slot 18 and operated in the usual manner to withdraw the bolt 19.

When it is desired to lock the padlock the member is forced downward to the position shown in Fig. 1 and the key is used to pro ject the bolt in engagement with the hasp,

the key is withdrawn and the door 37 closed.

- forms or' locking mechanisms might be used and that other ornamental designs may be placed upon the faces of the lock without in any way interfering with the principle of my invention. Furthermore, it will be obvious that the principle of my invention may be applied to other locks than pad locks.

Having thus described the invention is claimed as new is:

1. In a lock, a body having oppositely disposed face plates, one of said face plates being provided with a keyhole slot, a hinged door normally covering the keyhole slot, an angular latch disposed within the lock on the inside face of said last named face plate and adapted to operatively engage at its extremity with said. door to hold it closed, a design unit disposed upon the outside face of the face plate pivoted thereto and having its other end operatively connected to said latch whereby when the free end of the design unit is shifted the latch will be shifted out of engagement with the door, the opposite face plate of the lock having the same general configuration vand being provided what with a like design unit but lixed from movement.

2. ln a lock, a body having oppositely disposed ace plates, one of said face plates being provided with a keyhole slot, a raised frame surrounding the keyhole slot, and ilicluding oppositely disposed piers and a pediment, a door hingedly mounted upon the face plate and disposed entirely within said frame when closed and having an inwardly projecting keeper, a spring actuated latch disposed on the inside of the face plate and engaging with said keeper, an ornamental member forming a design unit djsposed in the pediment pivotally mounted at one end to the face plate and at its other end having a portion projecting through the face plate and engaged with said latch, the free end of said ornamental member being dis osed adjacent to one -portion of the raise whereby said raised frame will form a fulcrum for engagement by an implement de1 signed to shift the unit, a movement of the ornamental member in one. direction raising the latch from its 'engagement with frame of the pediment the keeper', and a face plate disposed opposite the first named face plate having the same general form but being imperl'orate, the

face of this last named plate being formed with an imitation door frame comprising oppositely disposed piers and a pediment and also being formed with an ornamental member disposed Within said pediment and being a duplicate of the lirstnamed ornamental member.

3. ln a lock, a body having oppositely disposed face plates, Aone of said faceplates being provided With a keyhole slot, a raised frame surrounding the keyhole slot and including oppositely .disposed piers and a pedinient, a door disposed entirely Within' said framevvvhen closed -and having an in- .Wardly projecting keeper adapted. to eX- 'tend through an opening in the face plate vvhen the door is closed, said d oor having pintle members extending into the sill and cross bar of the pediment, a spring on the inside of the face plate having a pin projecting therethrough and contacting with the door to urge the door to open position, a latch mounted upon the inside of the face plate, one end of said latch being formed to provide a spring urging the latch into engagement with the keeper on the door, an ornamental design unit disposed within the pediment adjacent to the cross bar thereof and having a pin passing through a slot in the face plate and engaging said latch, and a face plate`disposed opposite the first named face plate having the saine 'eneral formbut being imperiorate and ormed With an imitation door frame com prising oppositely disposed piers, a pedi ment and also being formed With an ornamental member disposed Within said pediment and being a duplicate ofthe first named ornamental member. v

In testimony whereof l aiiix my signature in presence of two Witnesses. l FRANK B. JAEGER. [1.. s]

Witnesses:

Crus. J'. Parnassia, v GEORGE `W. ANDERS.

@oplei of this patent may he obtained fr five cents each, by addressing the Commissioner of Patent!A Washington, D. G. 

